Question

5. Which of the following order is correct for ionisation
energy ?
(A) Be <B<C<O<N
(B) Be > B>C»N>O
(C) B < Be <C<O<N
(D) B<Be <C<O<N

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Answer 1

Answer:

option A is the answer

Hope it helps u

Answer 2

Explanation:

The correct order is Mg>Al>Si.Mg(ns2) has higher ionization energy than Al(ns2np1) because s-sub shell electrons have higher penetration power than that of p-sub shell electrons. Further across the period size decreases and nuclear charge increases and therefore, ionization energy increases.